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A authority management system for nuclear power plant safety level dcs

A technology of authority management and safety level, which is applied in the direction of transmission system, digital transmission system, safety communication device, etc., can solve the problems of authority overreach, nuclear safety level DCS security risk, user database incompatibility, etc., to reduce inconvenience and overcome information Isolated islands, the effect of avoiding security risks

Active Publication Date: 2022-06-24
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are two disadvantages in this authority management scheme. On the one hand, there is the situation of authority overriding. For example, the person holding the key can switch the DCS to any working mode through the key switch, but in fact the system maintenance engineer does not have the configuration The configuration engineer does not have the authority to maintain the system. If the staff mistakenly switches the DCS to an operation mode that does not conform to their own authority, it will bring potential security risks to the nuclear safety DCS.
On the other hand, the authority management method has the phenomenon of information islands. The user databases of the engineer station and the safety display station are not interoperable. For some senior engineers who have the operation authority of the field control station, safety display station and engineer station Only by mastering multiple switch keys and multiple sets of passwords can the authorities be successfully exercised
[0006] In addition, in some non-safety level DCS, access to the data server or security audit server through the network is used for authority verification. Although this method can also achieve unified authority management, this method requires online access and cannot meet the security level. DCS system requires reliability, so it cannot be applied to safety-level DCS

Method used

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  • A authority management system for nuclear power plant safety level dcs
  • A authority management system for nuclear power plant safety level dcs
  • A authority management system for nuclear power plant safety level dcs

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Experimental program
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Effect test

Embodiment

[0040] like Figure 1 to Figure 5 As shown, the present invention is a rights management system for nuclear power plant safety-level DCS, including electronic keys, a central user database, a mirror database and a maintenance network, the central user database is set in the engineer station; the mirror database is set in the Each function station, each function station corresponds to a local mirror database, and the engineer station and each function station are connected through a maintenance network for communication; wherein, each function station includes an on-site control station, a safety display station, and a transmission station;

[0041] The electronic key, as a port for users to initiate authorization requests, allows users to insert the electronic key into the host equipment of each functional station; and the electronic key identification code of the electronic key is the same as the user identification of the central user database. code to bind;

[0042] The ce...

Embodiment 2

[0056] like Figure 1 to Figure 5 As shown in the figure, the difference between this embodiment and Embodiment 1 is that the electronic key adopts a numeric keyboard with a USB male head and can input a user password and a biometric information identification module; The USB female port of the electronic key, the USB female port matches the shape and size of the USB male head. When in use, it is ensured that the electronic key is inserted into the host device of each functional station smoothly, so as to grant corresponding operation authority to persons with different identities. After the electronic key is inserted into the host device of the function station through USB, it prompts to input the user password or fingerprint identification on the electronic key.

[0057] At the on-site control station, insert the electronic key into the main control device of the on-site control station, and enter the password or identify the biometric feature through the electronic key, an...

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Abstract

The invention discloses an authority management system for a safety-level DCS of a nuclear power plant, which includes an electronic key, a central user database, a mirror database and a maintenance network. The central user database is set at the engineer station; the mirror database is set at each functional station, and the engineer The station communicates with each function station through the maintenance network; the electronic key is used as the port for the user to initiate an authorization request. After the user inserts the electronic key into the host device of the function station, the host device of the function station reads the electronic key The electronic key identification code and the encrypted relevant information of the user are authenticated in the mirror database of the function station; after the authentication is passed, the corresponding operation authority is granted to the user. If the user's operation exceeds the scope of his own authority, the operation is judged invalid and Give tips. The invention grants corresponding operation rights to personnel with different identities, overcomes the situation of unauthorized operation of the nuclear safety level DCS, and facilitates system maintenance.

Description

technical field [0001] The invention relates to the technical field of digital instrumentation and control of nuclear power plants, in particular to an authority management system for safety-level DCS of nuclear power plants. Background technique [0002] The Digital Control System (DCS) of the nuclear power plant is the central nervous system of the nuclear power plant, which can enable the nuclear power plant to run safely and smoothly under any working conditions. The safety-level protection system is the most important control system in the DCS system of a nuclear power plant. It ensures that the nuclear power plant can be brought to a safe state when an accident occurs. Therefore, the safety-level protection system is required to have extremely high reliability. [0003] In the unsafe events of DCS, the faults caused by human operation account for a large proportion, especially in the process of modifying control logic, downloading software, forced output and other equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40
CPCH04L63/105H04L63/101H04L63/08H04L63/083H04L63/0861
Inventor 王舜刘明星梁建秦官学马文桂黄起昌田旭峰黄奇杨睿武有光张旭
Owner NUCLEAR POWER INSTITUTE OF CHINA
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